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Thread: DEG/MIN on helix

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  1. 03-31-2016, 08:51 PM #1
    desmotom
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    DEG/MIN on helix

    I have no problem calculating the deg/min feed on a 4th axis when it is a path along the same X on a vertical mill. Now with a helix, the circumference is going to be longer. Is there a constant value that I can use to accommodate for the length of helix? Also when posting in Gibbs with the same parameters, the posted feed rate is half what I calculate....not sure why.

    any insight on this would be great.

    Tom
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  2. 04-01-2016, 03:00 AM #2
    dpuch
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    Re: DEG/MIN on helix

    Mentally "unroll" the helix and calculate it in 2d. For 1 revolution rotary distance is the circumference, and the pitch is the linear distance. You now have two of the 90 deg sides of a triangle. Calculate the 3rd length and you can likewise break up your feeds into proportional values. Look into added vector math for more.
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  3. 04-04-2016, 02:56 PM #3
    desmotom
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    Perfect! Thanks
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